Add retries and compression while sending spans to OTLP collector

[mfvanek]

Closes #213

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.41%. Comparing base (61b7c83) to head (49f99ef).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #288      +/-   ##
============================================
- Coverage     94.52%   94.41%   -0.11%     
- Complexity       73       74       +1     
============================================
  Files            27       27              
  Lines           219      215       -4     
  Branches          7        7              
============================================
- Hits            207      203       -4     
  Misses            7        7              
  Partials          5        5              

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